Alert archive / Florida / Special Weather Statements in 2015

Special Weather Statement, NWS Mobile, AL

June 21, 2015Okaloosa County, Florida

NWS Mobile, AL issued this special weather statement at Jun 21, 2015, 1:21 PM CDT for Okaloosa County, Florida. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 21, 2015, 1:21 PM CDT (18:21 UTC)
Expired: Jun 21, 2015, 2:00 PM CDT
In force: 39 min
Issued by: NWS Mobile, AL

County Okaloosa County, FL

The radar

The Eglin Afb radar (KEVX), 54 km from the middle of the area, began a volume at 18:21 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 6.4 hours before the alert went out and 210 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1467 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 915 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 33 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

300 
WWUS84 KMOB 211821
SPSMOB

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
121 PM CDT SUN JUN 21 2015
 
FLZ205-206-211900-
OKALOOSA COASTAL FL-OKALOOSA INLAND FL-
121 PM CDT SUN JUN 21 2015

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN OKALOOSA COUNTY
UNTIL 200 PM CDT...

AT 121 PM CDT...A STRONG THUNDERSTORM WAS LOCATED OVER VALPARAISO...
MOVING NORTHEAST AT 10 MPH.

LOCATIONS IMPACTED INCLUDE...
NICEVILLE...           VALPARAISO...          EGLIN AFB...
LAKE LORRAINE...       SHALIMAR...            

THE PRIMARY THREATS FROM THIS STORM ARE WIND GUSTS UP TO 55 MPH.
WINDS THIS STRONG COULD BLOW OFF TREE LIMBS AND ALSO BLOW AROUND
SMALL UNSECURED OBJECTS. SEEK SHELTER UNTIL THIS STORM HAS PASSED.

FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY
AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF
POSSIBLE. STAY AWAY FROM WINDOWS AND DOORS. AVOID USING WIRED
TELEPHONES DIRECTLY CONNECTED TO OUTSIDE PHONE LINES.

THIS STORM MAY CONTINUE TO INTENSIFY AND A WARNING MAY SOON BE
NEEDED. PLEASE CONTINUE TO MONITOR LOCAL RADIO OR TV FOR FURTHER
NATIONAL WEATHER SERVICE UPDATES OR POSSIBLE WARNINGS.

LAT...LON 3045 8642 3050 8644 3050 8642 3051 8642
      3051 8645 3049 8645 3048 8647 3052 8650
      3047 8648 3046 8650 3045 8654 3043 8657
      3047 8659 3048 8659 3055 8666 3078 8639
      3047 8639
TIME...MOT...LOC 1821Z 232DEG 9KT 3052 8654 

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 21, 1:54 PM CDT	Special Weather Statement	MOB	Mobile	66 min
Jun 21, 3:01 PM CDT	Special Weather Statement	MOB	Choctaw	59 min
Jun 21, 5:17 PM CDT	Special Weather Statement	MOB	Mobile	58 min
Jun 21, 6:22 PM CDT	Special Weather Statement	MOB	Mobile	53 min
Jun 21, 4:00 PM CDT	Special Weather Statement	MOB	Okaloosa	60 min
Jun 21, 4:13 PM CDT	Severe Thunderstorm Warning	MOB	Okaloosa	47 min
Jun 21, 5:51 PM CDT	Special Weather Statement	MOB	Santa Rosa	54 min
Jun 21, 6:05 PM CDT	Severe Thunderstorm Warning	MOB	Santa Rosa	29 min
Jun 21, 3:27 PM CDT	Special Weather Statement	MOB	Wayne	48 min
Jun 21, 3:52 PM CDT	Special Weather Statement	MOB	Greene	53 min
Jun 21, 4:24 PM CDT	Severe Thunderstorm Warning	MOB	Greene	66 min
Jun 21, 5:07 PM CDT	Special Weather Statement	MOB	George, Greene	53 min
Jun 21, 5:35 PM CDT	Severe Thunderstorm Warning	MOB	George, Perry, Stone	28 min
Jun 21, 5:51 PM CDT	Severe Thunderstorm Warning	MOB	George	29 min

Nearby

Special Weather Statements in Florida, 2015 Every special weather statement in 2015

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.